Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apjs...71..931h&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 71, Dec. 1989, p. 931-949. Research supported by NSF.
Astronomy and Astrophysics
Astrophysics
38
Early Stars, Emission Spectra, Line Spectra, Supergiant Stars, Infrared Radiation, Lyman Spectra, Spectral Line Width, Stellar Luminosity
Scientific paper
High-resolution spectra from 0.63 to 1.75 microns are presented, showing that the luminous young star LkH-alpha 101 and the post-main-sequence hypergiant MWC 300 have very similar emission-line properties. Tables are given of line measurements and identifications. It is found that, in spite of their different histories, these stars have similar conditions of density, temperature, kinematics, and possibly geometry in their line-emitting envelopes. The results support models of hypergiants and luminous young stars which both invoke dense equatorial disks and suggest that disk structures around some evolved hot young stars are created by dense equatorial winds.
Hamann Fred
Persson Eric S.
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